Skip to main content

Questions tagged [value-extraction]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
1 answer
47 views

QGIS plotting from a multiband raster in a ternary diagram

I am working on creating a (remote) superficial geological map using ASTER imagery in QGIS. I have made several RGB composites including Abram's ratio and Thermal Infra red indices to aid in ...
Anon's user avatar
  • 1
0 votes
0 answers
11 views

process the img1 using the img2 which contained with only 0 and 1 to keep the raster corresponding 1 and eraze the raster corresponding 0

How can I use an image with only 0 and 1 to process another image, so that the original image value corresponding to the 0 value area becomes 0, and the value corresponding to 1 is preserved? Is there ...
Cris Wang's user avatar
0 votes
0 answers
20 views

Absurdly large area estimates when extracting landcover area for individual polygons (CORINE Data)

I want to extract area under different CORINE classes as a part of my master's thesis. I am facing problems with the area estimates that QGIS calculates for landcover classes from the CORINE dataset ...
Tanvi Gurjar's user avatar
0 votes
0 answers
27 views

Extracting monthly band data from an image collection from a pixel with 1000 sample points into a table as CSV - not as chart

I have 1000 field samples as points. I would like to Extract band values from ERA5land which is already monthly aggregated for each of the points The data is stored in many bands, I have selected my ...
David Appiah-Gyimah's user avatar
0 votes
2 answers
85 views

Array: No numbers in 'values', must provide a type

I'm trying to extract the pixel value of the first image of the Modis Aqua chlor_a product but when applying the code I used to do this with the Landsat dataset I'm having an error : Error in map(ID=...
Aurélien Lengrand's user avatar
0 votes
0 answers
49 views

No numbers in 'values', must provide a type

I'm facing an error when trying to export all the pixel value of a ImageCollection. The error is : But when I check the corresponding image in my dataset I don't see anything different from the other....
Aurélien Lengrand's user avatar
0 votes
0 answers
68 views

Interpolate raster value using Python

I'm new in coding. I have a shapefile (points) and 15 raster files My purpose is get the values from all raster to point (each point will get value from 2 or 3 nearest cell baseed on distance of the ...
Long nguyen duc's user avatar
0 votes
0 answers
49 views

Extract Value to Points using ArcMap

I am using ArcMap. I am trying to extract NDVI values to my point data. However, when I use the tool Extract Values to Points the error is generated as:- I think they have same Projected Coordinate ...
Pushkar's user avatar
  • 83
1 vote
2 answers
338 views

Sample Regions - excludes points with masked bands. Google Earth Engine

I have a set of points from around the world and I want to extract the pixel values from a set of images, giving information about the local environment, for each point. Then export the set of values ...
Erin's user avatar
  • 157
0 votes
0 answers
54 views

Subtracting multiple rasters one point values from each related raster

I must extract values by point (just one point) from multiple "Tif" format raster and then times these values to -1 and add them to the raster files with raster calculator (calibration). I ...
coral's user avatar
  • 81
0 votes
0 answers
265 views

Getting NaN values when I extract pixel values of a raster using a point shapefile in R

I try to extract pixel values at defined points in a raster file in R, using a point shape file. With some raster files it works perfectly, with others it returns 'NaN' values for all extracted points....
Mark's user avatar
  • 29
1 vote
2 answers
120 views

Google Earth Engine: error when extracting pixels values of chlorophyll and SST for specific coordinates from SMI Modis Aqua

I'm trying to extract specific pixel values in a csv table of chlorophyll-a and sea surface temperature from Standard Mapped Image MODIS Aqua Data to match to the sampling site over the sampling ...
JenApp's user avatar
  • 13
1 vote
1 answer
1k views

Extracting band values of an Image Collection over a point shapefile in GEE

I have an image collection in GEE consisting of 36 images, each with 23 bands of Sentinel 2 data (S2L2A). I also have a point shapefile that I imported as an asset (RAEJORDANESIA_POINT). I want to ...
Paris's user avatar
  • 591
1 vote
0 answers
51 views

Negatively buffer edges of thermal resolution raster layer to fit within a higher resolution RGB raster layer to avoid soil temperature extraction [closed]

I want to exclude overhanging thermal pixels in a raster layer to fit within a higher resolution RGB raster layer to avoid extracting any soil temperature. I have tried buffering in QGIS but will only ...
Johan Deutschenbaur's user avatar
1 vote
1 answer
83 views

Take information from point along coast and make it inland

I'm trying to create a map in ArcGIS Pro using the National Coastal Erosion Risk Mapping Dataset. The dataset shows the likely amount of erosion (metres) at each point along today's UK coastline. I'm ...
Lucy Kingwell-Meader's user avatar
2 votes
0 answers
35 views

Extract Values to Table: wrong number of pixels

Using ArcGIS Pro and arcpy I am iterating through a shapefile using a SearchCursor to extract the pixel values of a raster for each polygon in the shapefile using the Extract Values to Table (...
RArosio's user avatar
  • 21
3 votes
2 answers
744 views

Extracting raster values to points using ArcMap

I am working on a project to determine the coastal vulnerability. I have different variables like elevation, LULC, bathymetry, etc. of the entire study area. I am stuck in the middle of my analysis. ...
Badal's user avatar
  • 329